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3 years ago

Plz help I REALLY NEED IT LIKE RIGHT NOW

Chemistry

1 answer:

loris [4]3 years ago

6 0

Answer:

For most people, metal is another word for iron, steel, or a similar hard, shiny substance.

But does this definition fit with the true properties of metals?

Yes… and no.

Before we explain, you should know that most of the elements in the periodic table are metals.

Metals are found in the center and left side of the periodic table. They can be further classified as alkali metals, alkaline earth metals, transition metals, and basic metals.

Explanation:

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2 Use the chart to answer the question. Solubility Curves of Various Salts 180 160 140 120 100 80 KNO3 in g NaCl in g KCl in g A

VMariaS [17]

According to the information in the graph, it can be inferred that the amount of solute that will precipitate out of solution at 20°C is 130 grams.

<h3>How to calculate the amount of solute that precipitates out of solution?</h3>

To calculate the amount of solute that precipitates out of solution we must identify the solute data at 80°C and 20°C and identify the difference as shown below:

Quantity of solute at 80°C: 170 grams.
Quantity of solute at 20°C: 40 grams.

170 grams - 40 grams = 130 grams

According to the above, the amount of solute that will precipitate out of solution due to the change in temperature is 130 grams of KNO3.

Note: This question is incomplete because the graph is missing. Here is the graph

Learn more about solute in: brainly.com/question/7932885

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7 0

2 years ago

#1. Which statement is a correct expression of the Law of Conservation of Mass? A. The total mass is unpredictable in a chemical

Cerrena [4.2K]

These are two questions and two answers.

Question 1: Law of Conservation of Mass

Answer: option B. The total mass remains the same during a chemical reaction.

Explanation:

The law of conservation of mass is a universal law. It states that mass is mass is neither created or destroyed, but is is conserved.

In chemical reactions, that means that, always, the total mass of the reactants equals the total mass of the products or, as the option B. states, during a chemical reaction the total mass remains the same.

Since, in chemical reactions, the atoms are not modified (the atoms just bond in different form or with different atoms), that implies that total number of each kind of atoms in the reactants equals the total number of the same kind of atoms in the products.

That is the basis for balancing the chemical equations and for the stoicheometric calculations.

Question 2 . Which element(s) are not balanced in this equation?

Answer: option A. Only the Fe is unbalanced.

Explanation:

1) Given equation: Fe₂O₃ + 3 CO → Fe + 3 CO₂

2) Count the number of atoms of each kind on each side of the equation

i) Fe

reactant side: 2

product side: 1

Therefore, Fe is not balanced

ii) O

reactant side: 3 + 3 = 6

Product side: 3 × 2 = 6

Therefore, it is balanced

iii) C

reactant side: 3

product side: 3

Therefore, C is balanced.

3) Conclusion: Only the Fe is unbalanced.

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3 years ago

Read 2 more answers

At what minimum temperature do rocks melt into lava?

navik [9.2K]

The answer is D 800 degrees Celsius

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3 years ago

What type of words should you include when you write your hypothesis

nignag [31]

Answer:

An if/then statement. If ____happens, then _____ happens.

Explanation:

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3 years ago

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Help I Will Mark Brainlist !! (ATTACHED IMAGE BELOW) Which of the diagrams below would be the FASTEST? _____ Why? Which of the d

VLD [36.1K]

Answer:

Fastest C. Reaction time is faster

Slowest A. Reaction time is slower and it takes longer to finish

Explanation:

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2 years ago